Is there a way to detect OS in fish shell akin to the OSTYPE variable in bash? -

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Now I'm forced to use the uname to get the operating system name is. But bash has OSTYPE environment variable that is set automatically and I was thinking that something is similar.

It seems that the statutory method of executing a conditional code based on the operating system type Using the switch with the uname result remove. See examples: 

  Switch (Single) Case Linux Echo Hi Tux! Case Darwin Echo Hi Hexley! Hi Free Hi! Hi Case! FreeBSD NetBSD DragonFly Hi! The case '*' echo, hi stranger! End

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